Possessive metamour

My boyfriend and I have been dating for over two years but have been in a BDSM dynamic for four years, we have always had an open BDSM dynamic due to not always having the same kinks but we opened up our relationship sexually a year ago.
In that time he took on more constant play partners, I am perfectly happy with this but some of the girls he goes with [a metamour] makes me uncomfortable, I always feel pushed out if our whole group is out together at a BDSM munch/event, as one gets really possessive over him and pouty when he pays me any attention. Especially when she gets drunk. The other is newer and is one who he has spoken to me about in the sense he would like to take things sexually with her. My issue with her is she has tagged him in pictures calling him daddy or if I’ve been in the room with his phone or laptop and seen her pop up I’ve seen parts of messages where she calls him daddy.
This is a dynamic I’ve discussed with him where we both agreed to be more open about due to its nature. I’ve pulled him up on this and he said its a joke as she calls anyone she is close to daddy/mummy in a baby voice in certain situations. Since the pandemic he obviously can’t see anyone but me cause we live together, but I can hear their phone conversations as I move through the house and it sounds flirty and cute, which doesn’t bother me at all but the conversation goes dead until I leave the room and I am out of earshot, which makes me uncomfortable and paranoid, as I’ve already had one relationship where things were hidden. I don’t fancy another.
I feel like it’s my own fault I feel uncomfortable as I met them weeks after he did due to missing a few events cause of my own issues.
I like the girl that he likes as a friend she is really friendly and we talk alot about common interest and I’ve been helping her try and think of a birthday present for him and I am happy for them to have whatever dynamic they have I just want to be informed.
He hasn’t even really changed with me either, he is still cute and loving, but a bit more protective cause of the pandemic cause I’m classed as vulnerable.
What should I do? And the paranoia just all in my head?

One of the interesting but semi-unfortunate aspect of polyamory or an open dynamic is that you can see all of the different types of people you partner dates. Because we live in a society that convinces us that we have to consume in order to be the “best” to attract “the one”, we often believe that we have attracted the person we were with because we are talented in some way… and sometimes, given the types of people our partner dates, we learn differently.

You don’t have to like the people your partner dates no more than you have to like the people your partner befriends. What’s needed are some boundaries and some better behaviour on the part of your partner. It wouldn’t be acceptable for one of your partner’s friends to be possessive over him and get pouty when you’re all out in public together, so why is it okay for anyone else? He needs to put his foot down when it comes to you being within a group and advocate for you rather than allowing you to be pushed out — or you need to find another BDSM group (though I don’t know how useful that is in your area).

When it comes to the other person, I think that you need to put some boundaries around yourself and how much you’re involved in a friendship with her if you notice that you’re dwelling on what she’s doing online. Her messages to him are technically private and you shouldn’t be looking at them unless she’s agreed to that. And I could understand why, if you have a proclivity to read his messages, he is unwilling to put anything on display that might cause you to question his honesty.

A big part of this problem is your previous experience of having a relationship where things are hidden. In response, you’re attempting to prevent that happen by creating this rule that you “stay informed”. You’re under the impression that somehow you can spot someone being dishonest to you and prevent yourself from being hurt again. On the one hand, this makes a lot of sense. Your brain is trying to prevent you from being hurt again. But the problem with this line of thinking is it places the burden of preventing someone from lying to you on your shoulders.

The result is that you become paranoid and afraid of everything and also that you must conclude that the reason that your previous relationship didn’t work out was because you failed somehow — which isn’t true. Whomever was dishonest to you in the past, you are not to blame to that. You cannot prevent this from happening to you again ultimately. You are going to have to make the scary leap of faith and trust that your partner will let you know if something will change and be honest with you instead of trying to spot something yourself.

Finally, this rule of being “informed” is probably not going to serve you well because it sounds nebulous. Not everyone can pinpoint when they start to develop deeper feelings for someone. And she may have deeper feelings for him than he does for her — which he also can’t control. Ask yourself what this rule is meant to do. What is it meant to prevent? What do you want to be informed about?

Maybe what you need to do is have a conversation with your partner when your expectations around how often you see him change or when he may have a regular partner because that may alter your schedule. Have a talk with each other about your ideals and see if you match up. Maybe you only want one other partner but he wants several. Having a realistic idea of what it is you might be aiming for in terms of having an open dynamic might be helpful.

And lastly, don’t blame yourself for being afraid. You’re allowed to be afraid, especially given what’s happened to you. See if you can find a polyam friendly therapist that might be able to work on some self-soothing techniques with you when your anxiety starts kicking into overdrive.

I hope this helps and good luck!

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